使用Python IDLE時發現并沒有清空當前窗口的快捷鍵，也沒有像 clear 這樣的命令，使用非常不便。

新建一個 ClearWindow.py腳本，源碼如下：

"""Clear Window ExtensionVersion: 0.2Author: Roger D. Serwy    roger.serwy@gmail.comDate: 2009-06-14It provides "Clear Shell Window" under "Options"with ability to undo.Add these lines to config-extensions.def[ClearWindow]enable=1enable_editor=0enable_shell=1[ClearWindow_cfgBindings]clear-window=<Control-Key-l>"""class ClearWindow:  menudefs = [    ('options', [None,        ('Clear Shell Window', '<<clear-window>>'),    ]),]  def __init__(self, editwin):    self.editwin = editwin    self.text = self.editwin.text    self.text.bind("<<clear-window>>", self.clear_window2)    self.text.bind("<<undo>>", self.undo_event) # add="+" doesn't work  def undo_event(self, event):    text = self.text    text.mark_set("iomark2", "iomark")    text.mark_set("insert2", "insert")    self.editwin.undo.undo_event(event)    # fix iomark and insert    text.mark_set("iomark", "iomark2")    text.mark_set("insert", "insert2")    text.mark_unset("iomark2")    text.mark_unset("insert2")  def clear_window2(self, event): # Alternative method    # work around the ModifiedUndoDelegator    text = self.text    text.undo_block_start()    text.mark_set("iomark2", "iomark")    text.mark_set("iomark", 1.0)    text.delete(1.0, "iomark2 linestart")    text.mark_set("iomark", "iomark2")    text.mark_unset("iomark2")    text.undo_block_stop()    if self.text.compare('insert', '<', 'iomark'):      self.text.mark_set('insert', 'end-1c')    self.editwin.set_line_and_column()  def clear_window(self, event):    # remove undo delegator    undo = self.editwin.undo    self.editwin.per.removefilter(undo)    # clear the window, but preserve current command    self.text.delete(1.0, "iomark linestart")    if self.text.compare('insert', '<', 'iomark'):      self.text.mark_set('insert', 'end-1c')    self.editwin.set_line_and_column()    # restore undo delegator    self.editwin.per.insertfilter(undo)

拷貝ClearWindow.py文件，放在Python安裝目錄Python XXX/Lib/idlelib下面（XXX為你的python版本，比如2.7）。

記事本打開Python XXX/Lib/idlelib目錄下的config-extensions.def（IDLE擴展的配置文件）， 為防止出錯，你可以在打開它之前先copy一個備份 。

修改config-extensions.def ，在末尾添加如下內容，然后保存退出：

[ClearWindow]enable=1enable_editor=0enable_shell=1[ClearWindow_cfgBindings]clear-window=<Control-Key-;>

打開Python的IDLE，options選項中就可以看到增加了Clear shell window ctrl+;。

在IDLE輸入代碼，然后按Ctrl+;（是指Ctrl和;），發現剛輸入代碼可以被清除了。

快捷鍵Ctrl+;,可修改成其他鍵，將

clear-window=<Control-Key-;>